A great guide for introducing students to the pH scale and acids and bases in their lives! Students will experiment with different concentrations, dilutions, and solutions to determine their acidity, and build to a scaffolded understanding of why different solutions have different acidities. The activity culminates with an introduction to calculating pH and pOH. This 30-40 minute activity shines because of how it strongly relates to life, including tooth decay, hair care, and bath bombs. Answer